No Picture - Sony KD-55A9F Service Manual

4.4 NO PICTURE: @ TUNER
RF input no picture / noisy picture
Check RF source cable
and antenna, OK?
OK
Check Tuner power line:
3.3V at JL2800 = 3.3V?
1.8V at JL2801 = 1.8V?
RESET value at JL2807 = 3.3V?
OK
All broadcasting channel
cannot be received?
OK
Refer to next page
NG
NG
NG
Check part mounting condition
for I2C SDA & SCL line. (Refer Note I2C)
OK
Change RF cable and antenna
Please refer DDCON
troubleshooting
NG
Change NG parts
connected to I2C bus
Notes: I2C
I2C line for all tuners except Japan
- Parts for I2C SDA line: R2800, C2803.
- Parts for I2C SCL line : R2801, C2804.
I2C line for Japan
- Parts for I2C SDA line: R2804
- Parts for I2C SCL line : R2805
52
SYS SET